摘要
综述了近几十年国内外关于环境侧风对空冷塔影响的研究方法和研究成果,指出环境侧风引起空冷塔入口进风不均匀、出口羽流偏斜和出口边缘逆流等问题,导致塔体整体通风阻力上升,降低了通风量,引起机组煤耗增加,被压低的烟气尾流还对下游环境造成一定污染。国内外学者通过试验、数值模拟等方法对空冷塔受侧风的影响进行大量研究,对其恶化机理和影响程度都有了一定认识,也提出了一些措施,使环境侧风的负面影响得到一定抑制,但至今还没有从根本上消除侧风的负面影响。提出进一步研究包括塔外流场在内的整个流场结构,开发新型结构,有望解决空冷塔受侧风影响的问题。
The methodology and important findings on dry cooling tower were summarized home and abroad. Cross wind can significantly alter the flow field around a dry cooling tower, resulting in asymmetrical wind intake, deflection of the plume flow and inverse cold flow at the outlet, which reduce the plant＇s efficiency and enhance the air pollution downstream. Much valuable research work have been done about the characteristics of the flow field around the tower, and also some ideas were proposed to reduce the negative influence of wind. However, so far no method has been verified as being ultimately effective in reducing the negative influence of cross wind, not to mention eliminating or even utilizing the wind effect. It is suggested that further study should focus more on the comprehensive flow field around dry cooling tower including the flow filed outside the tower shell and new design of tower structure to make use of the cross wind.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第4期882-890,共9页
Proceedings of the CSEE
基金
国家重点试验室开放课题(SKLD13KZ05)~~
关键词
空冷塔
间接空冷
环境侧风
进风不均匀
羽流偏斜
冷风回流
dry cooling tower
indirect air-cooled
cross wind
asymmetrical wind intake
deflection of the plume flow
inverse cold flow
